Waipawa Trunk Sewer Main Renewal
Council has made great progress with the affected stakeholders and expects to commence work early October 2019.
Prior to works commencing, Council, our contractor - Pipeworks, and The Property Group, who have lead the stakeholder engagement will be holding an open evening community session to provide a presentation and Q&A session on the project.
This is planned for Tues 1st October 2019 from 7pm-9pm in Council Chambers.
Specific communications will be released on this next week.
A further letter drop was released to landowners and affected parties this week.
The Waipawa Trunk Sewer Main Renewal project consists of the sewer line rehabilitation for 2.2 km of earthenware sewer east of the Waipawa town centre. The sewer main is largely located within private property with multiple defective joints that allow groundwater infiltration and root ingress. PipeWorks proposes to rehabilitate the existing 375 mm diameter pipe using cured in place pipe (CIPP) inducted by hot water.
Council and its contractor PipeWorks will aim to minimise any disturbance to you caused by this work however, it is important that you are aware of the type of activities that will occur during the works. These are outlined as follows.
1. Noise: During the relining works, PipeWorks need to run various items of construction plants. Including air compressors, generators, boiler and other items powered by diesel engines.
2. Traffic: Some construction vehicles will be required to park on the side of the road, however PipeWorks expect this to cause minimal disturbance to residence and road users. Some vehicles or workers may require access to your property in order to access existing manholes within the pipeline. Where this is the case, you will be contacted firstly and well in advance.
3. Smell: The liner is impregnated with polyester resin. There will be some smell present during installation period. PipeWorks expect this not to be noticeable beyond 10 meters. For properties close to the relining works, as they progress along the pipeline alignment, sensible actions that can mitigate any smell are those such as closing the windows to your house.
Planning is ongoing on this project, council is currently working with landowners to gain access to the pump station for the upgrades planned, and secure easements for power and sewer lines.
In addition, Council is working with Centralines to deliver a transformer relocation and power upgrade to the McGreevy Street pump station.
This week marked an important milestone for this project where the contract was officially signed and awarded to Pipeworks Ltd, to be supported by Higgins.
This project is to renew 2200m of the 375mm gravity sewer main that runs from the McGreevy Street pump station all the way through the back of properties to the Waipawa Wastewater treatment pond (WWTP), this is a key project as part of the wider Waipawa WWTP improvements as well as improving infiltration and inflow into the network, whilst providing a better level of service.
A pump station upgrade at McGreevy Street will also form a part of this project – work is expected to commence in Sep 2019 and be complete by Dec 2019, over the next few months, Council will concentrate on ensuring all landowners are across the works proposed prior to commencement.
The project is currently in the open market under tender, council is also currently working with affected landowners to prepare for the access required and the pump station upgrade.
We expect to have awarded a contractor by June 2019 and aim to complete all works by December 2019.
Following approval of the option in December 2018, GHD Ltd proceeded to develop a concept design to;
Mitigate root intrusion & other factors that impact operational performance
Maintain Dry Weather Flow capacity
Improve Peak Wet Weather Flow capacity to provide conveyance for 1-in-2 year Storm (current), at 187 l/s.
Update - 20 December 2018
An option assessment was undertaken by GHD and CHBDC to better understand the upgrade options we had available for this pipeline.
From this option assessment, a workshop was held with Council and a preferred option identified.
Following a tender and evaluation process, Council has awarded the design component of this project to GHD, and will start the design and risk review component this month.
This will involve reviewing CCTV, scoping and confirming the best renewal technique for this project. This will be reliant on the structure of the pipe. Due to the location of the pipe, a fair amount of stakeholder communication will take place prior to any works starting.
Council plans to start physical works following a tender phase in May 2019 allowing for a 5 month construction window and aiming to complete works by November 2019.
Further updates will be provided as this project progresses.
This project involves the cleaning and relining of the 375mm trunk sewer main that runs from McGreevy Street to Guy Street, and then again from Shanly Street to Johnson Street in Waipawa. This work will proactively prevent further tree root intrusion, and addresses the infiltration of ground water into the waste water system.
The Waipawa Trunk Sewer Main Renewal project consists of the sewer line rehabilitation for 2.2 km of earthenware sewer east of the Waipawa town centre. The sewer main is largely located within private property with multiple defective joints that allow groundwater infiltration and root ingress. PipeWorks proposes to rehabilitate the existing 375 mm diameter pipe using cured in place pipe (CIPP) inducted by hot water. PipeWorks believe that the replacement of the 375mm concrete capped sections of pipe can be reinstated using our normal CIPP process.
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